Cash register



FIG. 1 is a right front perspective view of a cash register, showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof, and

FIG. 5 is a right side elevational view thereof, the left side being a mirror image of the right side. 

The ornamental design for a cash register, substantially as shown and described. 